实数x满足,(x²-3x)²+7(x²-3x)+6=0,则x²-3x=

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实数x满足,(x²-3x)²+7(x²-3x)+6=0,则x²-3x=实数x满足,(x²-3x)²+7(x²-3x)+6=0,则x

实数x满足,(x²-3x)²+7(x²-3x)+6=0,则x²-3x=
实数x满足,(x²-3x)²+7(x²-3x)+6=0,则x²-3x=

实数x满足,(x²-3x)²+7(x²-3x)+6=0,则x²-3x=
解令t=x²-3x
则原来的方程变为
t²+7t+6=0
即(t+1)(t+6)=0
即t=-1或t=-6
即x²-3x=-1或x²-3x=-6.

令x^2-3x=A
A^2+7A+6=0
(A+1)(A+6)=0
A=-1或A=-6

当A=-6是 x无解

x^2-3x=-1